1. Department of Psychiatry, College of Medicine, Hallym University, Chunchon, Korea.
2. Department of Psychiatry, Catholic University, Daejeon St' Mary Hospital, Daejeon, Korea.
3. Division of Nephrology, Department of Internal Medicine, College of Medicine, Hallym University, Chunchon, Korea.
4. Department of Psychiatry, Korea University Medical Center, Seoul, Korea.